BRASILIA - A 25-year-old man burst into a preschool in southern Brazil and killed four children with a hatchet-like weapon before turning himself in to police, an attack President Luiz Inacio Lula da Silva condemned as "monstrous."
The attacker, who jumped a wall to get inside, also wounded four other children at the private preschool, known as the Good Shepherd Center, in the city of Blumenau, said police and government officials in the state of Santa Catarina.
He then rode a motorcycle to a state police station and handed himself in, police said.
Dozens of people gathered outside the preschool, whose external wall is covered in bright paintings of children and butterflies. Emergency workers and police had set up a security cordon, and were only allowing parents inside.
One parent outside was Bruno Bridi, the grief-stricken father of five-year-old Bernardo, who was killed. He told journalists how Bernardo and a friend had been hopping like bunnies when he dropped him off at school in the morning.
"I just thank God for every moment I spent with my son," he said through tears.
Brazilian media carried images of small bodies covered in white sheets on the preschool's playground, and a sobbing mother leaving the building carrying her son, who survived the ordeal.
Andre Nazario, whose wife works at the school, said she had described a horrific scene when he spoke with her.
"She said that after the guy left, she went to the playground and saw the (victims). She tried to do CPR on one of them, apparently, but it didn't work. She was in a state of shock," he told journalists.
The attacker mainly struck his victims in the head, emergency official Diogo de Souza Clarindo told journalists.
He killed three boys and one girl, who were between five and seven years old, Clarindo said.
The wounded children -- two girls, both aged five, and two boys, ages three and five -- were in stable condition, said the hospital treating them.
Authorities said the attacker was a Santa Catarina resident with at least four prior arrests, including for stabbing his step-father.
He acted alone, police chief Ulisses Gabriel told a news conference, ruling out a "coordinated" attack.
President Luiz Inacio Lula da Silva condemned the attack.
"There is no greater pain than a family that loses children or grandchildren, even more so when it is in an act of violence against innocent and defenseless children," he wrote on Twitter.
"My thoughts and prayers are with the victims' families and the community of Blumenau in the face of this monstrous attack."
He later held a minute's silence for "the victims of this barbarity" before an event at the presidential palace.